About the Role

We are looking for a hands-on Embedded Firmware & Hardware Engineer to develop and support connected embedded products from concept through prototype, testing, deployment and customer delivery. The role is primarily focused on embedded firmware development, with strong responsibility for embedded hardware and PCB design, system integration, debugging, and product development. The engineer will also participate in customer technical discussions, product demonstrations and business-development support.

Key Responsibilities — Embedded Firmware

● Develop and maintain firmware for ESP32, STM32 and other microcontroller-based platforms.

● Develop robust Embedded C/C++ using structured, maintainable and modular software architecture.

● Implement state machines, timers, interrupts, GPIO control, peripheral drivers and application logic.

● Develop bare-metal and RTOS-based firmware as required; FreeRTOS experience is desirable.

● Develop and debug I²C, SPI, UART, RS-485/Modbus, CAN, USB and other embedded communication interfaces.

● Implement sensor acquisition, signal processing, actuator control and real-time control logic.

● Develop Wi-Fi/BLE/IoT connectivity and device-to-cloud communication where required.

● Implement OTA firmware updates, configuration updates, boot/recovery mechanisms and safe update strategies.

● Work with Flash, NVS/EEPROM and other non-volatile storage mechanisms.

● Implement reliable data logging, error handling, fault recovery and watchdog mechanisms.

● Optimize firmware for timing, memory usage, reliability and long-term field operation.

● Debug firmware using serial logs, JTAG/SWD, oscilloscopes, logic analyzers and other tools.

Key Responsibilities — Embedded Hardware & PCB Design

● Design embedded hardware and complete PCB assemblies for microcontroller-based products.

● Create schematics and PCB layouts using Altium Designer, KiCad, OrCAD, Eagle or equivalent tools.

● Select MCUs, sensors, power supplies, communication ICs, connectors, drivers, relays, MOSFETs and other components.

● Design power-supply and power-management circuits including regulation, protection, filtering and power sequencing.

● Design digital and analog interfaces including GPIO, ADC, DAC, PWM, UART, SPI, I²C, RS-485, CAN, USB and Ethernet as applicable.

● Design motor/actuator driver circuits, relay interfaces and other control circuitry.

● Perform PCB placement, routing, grounding, power distribution and signal-integrity considerations.

● Consider EMI/EMC, ESD, thermal management, creepage/clearance and electrical protection during PCB design.





● Generate manufacturing outputs including Gerber, drill files, BOM, pick-and-place files and assembly documentation.

● Perform PCB bring-up and hardware validation on prototype boards.

● Debug hardware using oscilloscopes, multimeters, logic analyzers, electronic loads and laboratory equipment.

● Identify and resolve power, communication, noise, signal-integrity, component and thermal issues.

● Work closely with firmware engineers to define hardware-software interfaces and peripheral requirements.

● Support PCB revisions, component substitutions, DFM/DFA improvements and production release.

● Coordinate with PCB manufacturers and assembly vendors during prototype and production builds.

Product Development & System Integration

● Own embedded product development from requirements, architecture and prototype through validation and deployment.

● Create technical specifications, interface documents, test procedures and debugging documentation.

● Perform functional, integration and system-level testing.

● Identify technical risks and propose practical engineering solutions.

● Support production release, field deployment and customer issue resolution.

● Perform root-cause analysis and corrective actions for hardware and firmware failures.

Client Interaction & Technical Discussions

● Participate in technical meetings with customers to understand requirements and project expectations.

● Explain firmware, hardware and system-level technical solutions clearly to customers.

● Support product demonstrations, proof-of-concept development and technical presentations.

● Coordinate with customers during debugging, validation and deployment activities.

● Convert customer requirements into actionable engineering tasks.

Business & Product Development Support

● Support recent-project discussions and technical feasibility studies.

● Assist in preparing technical proposals, architecture concepts, effort estimates and project scope.

● Identify opportunities for product improvements and new embedded solutions.

● Support pre-sales activities through technical demonstrations and proof-of-concepts.

● Work with business-development teams to evaluate technical feasibility of prospective projects.





Required Technical Skills

● Strong programming skills in Embedded C/C++.

● Hands-on experience with ESP32, STM32 or similar microcontrollers.

● Strong understanding of GPIO, interrupts, timers, ADC/DAC, PWM and common serial interfaces.

● Good understanding of state machines and real-time firmware design.

● Hands-on schematic capture and PCB layout/design experience for embedded products.

● Ability to take a PCB from system requirements through schematic, component selection, layout, prototype bring-up and hardware debugging.

● Experience with Wi-Fi/BLE and IoT systems is desirable.

● FreeRTOS/RTOS experience is an advantage.

● Experience with OTA, bootloaders and firmware update mechanisms is an advantage.

● Understanding of Flash memory, NVS/EEPROM and data-integrity mechanisms.

● Hands-on experience with oscilloscopes, logic analyzers and electronic debugging equipment.

● Familiarity with Git and embedded development tools/IDEs.

Preferred Product Experience

● ESP32-based commercial products.

● IoT-connected embedded products.

● Motor and actuator control.

● Temperature or sensor-based control systems.

● Relay/H-bridge control.

● LCD/HMI interfaces.

● Cloud-connected devices.

● OTA firmware updates.

● Data logging and offline-to-cloud synchronization.

● Embedded product prototyping, board bring-up and field debugging.

Education

B.E./B.Tech./M.E./M.Tech. in Electronics, Electronics & Telecommunication, Electrical, Instrumentation, Embedded Systems, Computer Engineering or a related discipline.

Immediate Joining: Candidates who can join immediately or have a very short notice period will be preferred.

Ideal Candidate Profile The ideal candidate is a hands-on embedded product engineer who can independently take ownership of firmware development while being comfortable with hardware and PCB design. The candidate should be capable of understanding requirements, designing firmware architecture and PCBs, developing and debugging the system, bringing up prototypes, validating the complete product, troubleshooting customer issues and supporting deployment. Clear technical communication and willingness to participate in customer-facing discussions are important.

Example Product Environment The role may involve products similar to a connected smart fryer, using an ESP32 controller, rotary encoder, I²C LCD, MAX6675 thermocouple, heater relay, H-bridge basket motor, Wi-Fi, OTA updates, NVS configuration, state-machine-based operation and cloud data logging.

Sr. Firmware and Hardware Developer

📌 Embedded Firmware, Embedded Hardware & PCB Design (Mumbai)
🏢 Entwine Technologies
📍 Mumbai